How can I write log(e) in MATLAB?
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I am trying to calculate x=log(e) but I can not. Any help?
6 个评论
sultana saffi
2021-4-16
x=log(e)
sultana saffi
2021-4-16
how can i give this function
sultana saffi
2021-4-16
I am trying to calculate x=log4(256) but i can not.Any help pleas?
sultana saffi
2021-4-16
x=log4(256)
John D'Errico
2021-4-16
Surely you can read the formula from that site?
f = @(x) 4.^x - 256;
log4_256 = fzero(f, 1.2345)
4^log4_256
采纳的回答
David Fletcher
2018-4-15
I assume you mean log10? In Matlab log is base e, so log(e)=1
x=log10(exp(1))
6 个评论
Melika Qahqaie
2018-4-15
Walter Roberson
2019-2-1
Note that very few programming languages use log() to indicate log base 10. Excel is the only one I have been able to find. log() or Log[] seems to represent natural log in nearly all languages.
As mentioned Excel uses log for base 10 by default; it has no built in natural log, requiring that a decimal approximation of e be passed as the second parameter for natural log.
I did find one language Kotlin that uses ln for natural log despite being supposedly interoperable with java which uses log for natural log...
Melika Qahqaie
2019-2-1
sultana saffi
2021-4-16
tanx
sultana saffi
2021-4-16
can you help with this pleas x=log4(256)
John D'Errico
2021-4-16
@sultana saffi Please stop spamming this question with answers and comments to compute a log to do your homework.
Do you know the basic rule for logs to other bases?
The formula is given here:
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